What does code U055C mean?

DTC codes / U05xx · Network communication / U055C

U055CInvalid Data Received From Special Purpose Vehicle Control Module C

U055C means the vehicle's main gateway or engine control module received data from a special purpose vehicle control module that it judged invalid, so it flagged the message as untrustworthy. The module is present on the network and transmitting, but the content of its data frame failed a plausibility or checksum test, so the receiving computer cannot act on it.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaNetwork communication

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.